package com.jskj.filters;

import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.apache.log4j.Logger;

/**
 * Servlet Filter implementation class CheckLoginFilter
 */
public class CheckLoginFilter implements Filter {

        private static Logger log=Logger.getLogger(CheckLoginFilter.class);
    /**
     * Default constructor. 
     */
    public CheckLoginFilter() {
        // TODO Auto-generated constructor stub
    }

	/**
	 * @see Filter#destroy()
	 */
	public void destroy() {
		// TODO Auto-generated method stub
	}

	/**
	 * @see Filter#doFilter(ServletRequest, ServletResponse, FilterChain)
	 */
	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
		// TODO Auto-generated method stub
		// place your code here

	        HttpServletRequest req=(HttpServletRequest)request;
	        HttpServletResponse resp=(HttpServletResponse)response;
	        HttpSession session=req.getSession(true);
	        String filepath=req.getServletPath();
	        String contextpath=req.getContextPath();
	        if (!filepath.equals("/login.jsp") && !filepath.equals("/loginAction.action")) {
                    if (session.getAttribute("username")==null) {
                            log.info("未登录访问目录："+filepath);
                            resp.sendRedirect(contextpath+"/login.jsp");
                    }else {
                            chain.doFilter(request, response);
                    }
            }else{
            	chain.doFilter(request, response);
            }
	        
		// pass the request along the filter chain
		
	}

	/**
	 * @see Filter#init(FilterConfig)
	 */
	public void init(FilterConfig fConfig) throws ServletException {
		// TODO Auto-generated method stub
	}

}
